Tool collection
Discover useful tools that help you work more efficiently.
Base64 Encoder & Decoder
Encode text and files to Base64 or decode Base64 strings back to text and original file data. Data URI is supported and everything is processed directly in your browser.
JSON Formatter & Validator
Format, validate, and minify JSON; format and minify XML. Supports auto-detect and indentation options, with all processing done directly in your browser.
My IP Address
Check and copy the public IP address your internet connection exposes, with browser, screen, language, timezone, and connection details.
Image Converter
Batch convert JPG, PNG, WebP, AVIF, GIF, BMP, and ICO images to your chosen format, adjust quality and dimensions, and optimize file size directly in your browser.
MP4 to MP3 Converter
Convert and extract audio from MP4, MOV, and M4V videos to MP3, choose 128, 192, 256, or 320 kbps quality, and process files directly in your browser without server uploads.
QR Code Generator
Create static QR codes for URLs, Wi-Fi, email, phone numbers, and text; customize colors, size, and error correction, then save as PNG. Everything runs directly in your browser.
PDF Tools
Merge and split PDFs, reorder or delete pages, convert JPG/PNG images to PDF, export PDF pages to PNG, and remove metadata—all directly in your browser without server uploads.
EXIF Metadata Remover
Remove GPS location, camera details, capture time, and similar EXIF metadata from photos in your browser without uploading them to a server.
File Hash Checker
Calculate SHA-256, SHA-1, and MD5 hashes and compare them with a checksum—all locally in your browser.
Duplicate File Finder
Find exact duplicate files by size and SHA-256 hash even when names differ, then export TXT/CSV removal candidates. Everything runs locally in your browser.
Batch File Renamer & ZIP Creator
Preview and bulk rename multiple files with prefix, suffix, find/replace, and sequential numbering, then save renamed copies in a ZIP. Everything runs locally in your browser with no upload.
Bulk Text & CSV Cleaner
Remove duplicate and empty lines, trim whitespace, sort lines, deduplicate CSV rows, select columns, and convert CSV to JSON up to 50 MB locally in your browser with no server upload.
SVG Optimizer & Compressor
Remove SVG comments, metadata, editor attributes, XML declarations/DOCTYPE and extra whitespace, and shorten color notation to reduce SVG size up to 10 MB. Everything runs locally in your browser with no server upload.
Color Palette & Gradient Extractor
Automatically extract 4–12 dominant colors from an image with HEX, RGB, HSL, WCAG contrast, CSS variables and a palette PNG, then generate a CSS gradient from the extracted colors. Up to 75 MB, processed locally in the browser with no server upload.
JWT Decoder & Verification Tool
Decode a JWT token to inspect its Header/Payload, exp, iat, nbf, and key claims, and verify its HS256 signature locally in your browser with no server upload.
Regex Tester
Test regular expressions in real time and inspect matches, capture groups, and replacements. Runs locally in your browser with JavaScript RegExp.
URL Encoder, Decoder & Parser
Encode and decode URL components with percent encoding, analyze query parameters, UTM tags and duplicate keys, parse URL components, and generate a cleaned URL locally in your browser.
Cron Expression Parser & Generator
Validate and parse standard 5-field Cron expressions, calculate up to 12 upcoming run times within the next year in your browser local timezone, and generate Crontab schedules.
Timestamp & Time Zone Converter
Convert Unix timestamps in seconds or milliseconds and date strings, show ISO, UTC, local time and 9 world time zones, and calculate the difference between two times. Runs locally in your browser with no server upload.
UUID / NanoID Generator
Generate up to 10,000 UUID v4, NanoID, HEX, and Base64URL random IDs with Web Crypto, with prefix, separator, and TXT download options.
Image & PDF OCR Text Extractor
Extract text from photos, screenshots, and scanned PDFs with 14 selectable OCR languages including Korean; text-based PDF pages are read directly. Files are never uploaded to the server.
Video Compressor
Compress video and MP4 file sizes and convert to MP4 or WebM when needed. Files are processed directly in your browser without server uploads.
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